STX Institutional Ownership & Shareholders
SEAGATE TECHNOLOGY HLDNGS PL (STX) is currently held by 1,926 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $174.84B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of STX tracked by InsiderSet, reporting ownership valued at approximately $14.64B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $9.78B, representing an estimated loss of -33.20% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% of the total disclosed STX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, State Street Corp, and several other long-term asset managers with concentrated positions in SEAGATE TECHNOLOGY HLDNGS PL (STX).
This page ranks the largest institutional STX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
1,926
Total Reported Value
$174.84B
Largest Holder
Blackrock, Inc.
Largest Position
$14.64B
Insider Transactions (90d)
50
Latest Filing Quarter
Q2 2026
New Institutional Positions
33
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.22% | 15,166,793 | $14,635,954,522 | $9,776,211,432 | -$4,859,743,090 | -33.20% | |
| Vanguard Capital Management Llc | 0.30% | 14,630,067 | $14,118,014,655 | $9,430,248,587 | -$4,687,766,068 | -33.20% | |
| State Street Corp | 0.28% | 9,911,669 | $9,571,909,059 | $6,388,863,604 | -$3,183,045,455 | -33.25% | |
| Fmr Llc | 0.34% | 8,153,134 | $7,867,773,075 | $5,255,347,114 | -$2,612,425,961 | -33.20% | |
| Vanguard Portfolio Management Llc | 0.35% | 7,999,686 | $7,719,696,990 | $5,156,437,602 | -$2,563,259,388 | -33.20% | |
| Invesco Ltd. | 0.58% | 7,536,880 | $7,273,089,113 | $4,858,122,110 | -$2,414,967,003 | -33.20% | |
| Wcm Investment Management, Llc | 9.34% | 5,320,463 | $5,153,028,172 | $3,429,464,041 | -$1,723,564,131 | -33.45% | |
| Jpmorgan Chase & Co | 0.29% | 5,201,103 | $5,037,427,733 | $3,352,526,972 | -$1,684,900,761 | -33.45% | |
| Geode Capital Management, Llc | 0.26% | 5,155,435 | $4,963,210,885 | $3,323,090,292 | -$1,640,120,593 | -33.05% | |
| Morgan Stanley | 0.24% | 4,720,524 | $4,555,308,471 | $3,042,755,360 | -$1,512,553,111 | -33.20% | |
| Capital Research Global Investors | 0.58% | 4,326,781 | $4,175,343,665 | $2,788,956,497 | -$1,386,387,168 | -33.20% | |
| Goldman Sachs Group Inc | 0.35% | 3,440,106 | $3,319,702,759 | $2,217,423,525 | -$1,102,279,234 | -33.20% | |
| Sanders Capital, Llc | 3.12% | 3,490,299 | $3,219,242,380 | $2,249,776,929 | -$969,465,451 | -30.11% | |
| Norges Bank | 0.30% | 3,095,723 | $2,987,372,695 | $1,995,441,131 | -$991,931,564 | -33.20% | |
| Massachusetts Financial Services Co | 0.80% | 2,560,276 | $2,507,401,741 | $1,650,302,704 | -$857,099,037 | -34.18% | |
| Wellington Management Group Llp | 0.40% | 2,414,136 | $2,329,641,240 | $1,556,103,783 | -$773,537,457 | -33.20% | |
| Arrowstreet Capital, Limited Partnership | 0.92% | 2,138,429 | $2,063,581,608 | $1,378,388,565 | -$685,193,043 | -33.20% | |
| Bank Of America Corp | 0.13% | 2,115,112 | $2,041,083,341 | $1,363,358,893 | -$677,724,448 | -33.20% | |
| Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main | 1.60% | 2,108,402 | $2,034,607,930 | $1,359,033,761 | -$675,574,169 | -33.20% | |
| Northern Trust Corp | 0.21% | 1,902,241 | $1,835,662,565 | $1,226,146,504 | -$609,516,061 | -33.20% | |
| Deutsche Bank Ag\ | 0.45% | 1,591,694 | $1,535,984,710 | $1,025,974,119 | -$510,010,591 | -33.20% | |
| Legal & General Group Plc | 0.31% | 1,530,731 | $1,477,155,413 | $986,678,588 | -$490,476,825 | -33.20% | |
| Jane Street Group, Llc | 0.91% | 1,473,813 | $1,422,229,545 | $949,990,384 | -$472,239,161 | -33.20% | |
| Price T Rowe Associates Inc | 0.14% | 1,430,343 | $1,380,282,000 | $921,970,491 | -$458,311,509 | -33.20% | |
| D. E. Shaw & Co., Inc. | 0.81% | 1,354,377 | $1,306,973,805 | $873,004,327 | -$433,969,478 | -33.20% | |
| Charles Schwab Investment Management Inc | 0.17% | 1,352,030 | $1,304,708,950 | $871,491,497 | -$433,217,453 | -33.20% | |
| Exchange Traded Concepts, Llc | 5.59% | 1,368,725 | $1,262,429,817 | $882,252,761 | -$380,177,057 | -30.11% | |
| Bank Of New York Mellon Corp | 0.20% | 1,286,208 | $1,241,191,866 | $829,063,953 | -$412,127,913 | -33.20% | |
| Aqr Capital Management Llc | 0.42% | 1,245,371 | $1,201,782,413 | $802,741,239 | -$399,041,174 | -33.20% | |
| Vanguard Fiduciary Trust Co | 0.26% | 1,233,702 | $1,190,522,430 | $795,219,635 | -$395,302,795 | -33.20% | |
| Royal Bank Of Canada | 0.17% | 1,044,994 | $1,008,420,000 | $673,582,233 | -$334,837,767 | -33.20% | |
| Capital International Investors | 0.21% | 1,032,054 | $995,932,110 | $665,241,367 | -$330,690,743 | -33.20% | |
| Lone Pine Capital | Stephen Mandel | 5.90% | 1,000,109 | $965,105,185 | $644,650,259 | -$320,454,926 | -33.20% |
| Polar Capital Holdings Plc | 2.69% | 984,377 | $949,923,805 | $634,509,727 | -$315,414,078 | -33.20% | |
| Dimensional Fund Advisors Lp | 0.16% | 942,529 | $909,579,560 | $607,535,343 | -$302,044,217 | -33.21% | |
| Swedbank Ab | 0.71% | 904,984 | $834,702,944 | $583,334,587 | -$251,368,357 | -30.11% | |
| Ubs Group Ag | 0.13% | 839,966 | $810,567,190 | $541,425,284 | -$269,141,906 | -33.20% | |
| National Pension Service | 0.52% | 834,705 | $805,490,325 | $538,034,149 | -$267,456,176 | -33.20% | |
| Point72 Asset Management, L.P. | 1.21% | 822,914 | $794,112,010 | $530,433,906 | -$263,678,104 | -33.20% | |
| Citadel Advisors Llc | 0.42% | 755,495 | $729,052,675 | $486,976,967 | -$242,075,708 | -33.20% | |
| Trivest Advisors Ltd | 22.38% | 737,780 | $711,957,700 | $475,558,232 | -$236,399,468 | -33.20% | |
| Sands Capital Management, Llc | 2.58% | 720,741 | $695,515,065 | $464,575,234 | -$230,939,831 | -33.20% | |
| Value Aligned Research Advisors, Llc | 4.09% | 709,357 | $684,529,505 | $457,237,335 | -$227,292,170 | -33.20% | |
| California Public Employees Retirement System | 0.38% | 698,149 | $673,713,785 | $450,012,882 | -$223,700,903 | -33.20% | |
| Russell Investments Group, Ltd. | 0.58% | 687,394 | $663,519,574 | $443,080,425 | -$220,439,149 | -33.22% | |
| Bank Of Montreal | 0.23% | 658,813 | $635,754,685 | $424,657,684 | -$211,097,001 | -33.20% | |
| Canada Pension Plan Investment Board | 0.34% | 639,711 | $617,321,115 | $412,344,916 | -$204,976,199 | -33.20% | |
| Millennium Management Llc | 0.41% | 633,069 | $610,911,585 | $408,063,616 | -$202,847,969 | -33.20% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.12% | 1,534,212 | $601,042,893 | $988,922,371 | +$387,879,478 | +64.53% | |
| Swiss National Bank | 0.31% | 616,040 | $594,478,600 | $397,087,063 | -$197,391,537 | -33.20% |
Frequently asked questions about STX
Who are the largest institutional holders of STX?
The largest institutional holders of STX reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Capital Management Llc, State Street Corp, Fmr Llc, and Vanguard Portfolio Management Llc. InsiderSet ranks institutional holders by their latest reported STX position.
What is STX institutional ownership?
This page tracks STX positions reported by institutional investment managers through SEC Form 13F. SEAGATE TECHNOLOGY HLDNGS PL (STX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own STX?
InsiderSet currently tracks 1,926 institutional managers reporting STX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of STX shareholders.
How much STX stock do institutions own?
Institutional investment managers disclosed approximately $174.84B in STX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was STX institutional ownership last updated?
The latest STX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional STX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its STX position after the reporting date.
Are institutions buying or selling STX?
Institutional buying and selling can be analyzed by comparing STX positions across consecutive 13F reporting periods. InsiderSet's STX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View STX ownership changes.
How has STX institutional ownership changed over time?
InsiderSet tracks STX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.